Visit http://www.mathsmadeeasy.co.uk/ for more fantastic resources. 
                        
                        
                           AQA, OCR, Edexcel  
                        
                            GCSE Science  
                        
                        
Probabilit                       GCSE Chemistry  
                                 The Periodic Table 
y                       
                                 Answers 
                                 Includes: 
                                            The periodic table 
                                            Development of the periodic table 
Total Marks 25                               
                                  
                        
                        
                        
                        
                        
                        
                                                                                                    Total Marks:        /25 
                        
www.CompleteTuition.co.uk  
                       Maths Made Easy © Complete Tuition Ltd 2017 
                        
        Visit http://www.mathsmadeeasy.co.uk/ for more fantastic resources. 
        
       Q1: What is the periodic table?  
       A= Arrangement of elements (1) by atomic number/groups/ periods (1)  
                                             (2 marks) 
       Q2: How is the modern day periodic table arranged? 
       A= In order of atomic number (1) and element with similar properties are in columns, known as 
       groups (1). 
                                             (2 marks) 
       Q3: Why is it called the periodic table? 
       A= Similar properties occur at regular intervals (1). 
                                             (1 mark) 
       Q4: How and why are elements placed in groups? 
       A= Elements in the same group have the same number of electrons in their outer shell (1).  This 
       means they have similar chemical properties (1). 
                                             (2 marks) 
       Q5: John Dalton proposed one of the early periodic table suggestions, before the discovery of 
       protons, neutrons and electrons.  Describe how he arranged the elements. 
       A= Atomic weights (1) 
                                             (1 mark) 
       Q6: Which scientist proposed the ‘law of octaves’? Circle one.  
                                
                                             (1 mark) 
        
        
        
        
       Maths Made Easy © Complete Tuition Ltd 2017 
        
                   Visit http://www.mathsmadeeasy.co.uk/ for more fantastic resources. 
                   
                  Q7: Describe the ‘law of octaves’ and explain why fellow scientists rejected the theory.  
                  A= Award 1 mark for each of the following points: 
                          Elements arranged by mass 
                                   th
                          Every 8  element similar  
                          Assumed all elements found  
                          Placed in octaves even if were not similar  
                          Only worked to calcium  
                                                                                                                        (5 marks) 
                  Q8: Who devised the original version of today’s periodic table. 
                   
                  A= Dmitri Mendeleev   
                  Also accept just Mendeleev  
                                                                                                                         (1 mark) 
                                                                                                                                    
                                                                                                                                    
                  Q9: Explain how Mendeleev’s structured his table? 
                   
                  A= 1 mark for each of the following points: 
                          Order of atomic weight 
                          In periods (arranged by properties)  
                                                                                                                        (2 marks) 
                   
                  Q10: How did Mendeleev approach his table differently from other scientists?  
                   
                  A= Left gaps for undiscovered elements  
                                                                                                                         (1 mark) 
                   
                  Q11: Arrangements by atomic weight provided Mendeleev with some elements that didn’t fit the 
                  pattern, such as Argon. Explain how this problem was eventually overcome.  
                   
                  A= 1 mark for each of the following: 
                          Table actually arranged by atomic number 
                          Discovery of isotopes 
                                                                                                                        (2 marks) 
                  Q12: Argon didn’t fit Mendeleev’s periods, explain why.  
                   
                  A= Accept one of the following: 
                          Noble gas 
                          Unreactive  
                                                                                                                         (1 mark) 
                  Q13: Using your periodic table give 2 examples of elements other than Argon that didn’t fit 
                  Mendeleev’s pattern.  
                   
                  Maths Made Easy © Complete Tuition Ltd 2017 
                   
                   Visit http://www.mathsmadeeasy.co.uk/ for more fantastic resources. 
                   
                  A= Accept 2 of the following: 
                          Potassium  
                          Hassium (Hs) 
                          Meitnerium (Mt) 
                          Any element that has a higher atomic number than the next element in the row. 
                                                                                                                        (2 marks) 
                                                                                                                                    
                                                                                                                                    
                  Q14: Explain why Mendeleev’s table is useful in understanding new elements.  
                   
                  A= 1 mark for each of the following: 
                          Idea of atomic number of undiscovered elements 
                          Idea of properties of undiscovered elements 
                                                                                                                        (2 marks) 
                   
                   
                  Maths Made Easy © Complete Tuition Ltd 2017